Yes, as I noted, the old DL Shuttle marketing page now just does a redirect to the Shuttle Check-In times page which is still there. But it's a bit odd that they don't have any marketing or description pages for the service on the website any longer that are directly accessible (as page now does a redirect).

<link rel="canonical" href="https://www.delta.com/content/www/en...a-shuttle.html"/>
<link rel="alternate" media="only screen and (max-width: 640px)" href="https://m.delta.com"/>
<meta http-equiv="refresh" content="0; url=https://www.delta.com/us/en/check-in-security/check-in-time-requirements/delta-shuttle-check-in">
</script>
<!-- end /apps/delta/www/components/page/onecolumn/personalization.jsp -->
<!-- begin /apps/delta/www/components/page/onecolumn/redirect.jsp -->
<p class="cq-redirect-notice inverse">This page redirects to <a href="/content/www/us/en/check-in-security/check-in-time-requirements/delta-shuttle-check-in.html">Shuttle Check-In Requirements </a></p>
<!-- end /apps/delta/www/components/page/onecolumn/redirect.jsp -->

They used to describe it as having "hourly departures", but that's clearly not true any longer as noted above. As another example, LGA-ORD is down to 8 daily departures on weekdays with a gap between 9AM and 12PM among others. Here's what it looked like in 2019 when they had 14 daily weekday depatures on this route flown on the 717. I suspect the Shuttle Check-In times page is just an artifact that someone forgot to clean up (which is not all that unusual for the DL website).